<?php
/*************************************************************
* This script is developed by Arturs Sosins aka ar2rsawseen, http://webcodingeasy.com
* Fee free to distribute and modify code, but keep reference to its creator
*
* This class implements music theory for generating scales and chords
* based on interval patterns between notes. User can add custom scale and chord pattern.
* This class can generate scale notes based on provided scale name and type,
* generate chord notes based on provided chord name and type,
* transpose scales, transpose chords,
* generate all chords that include provided notes,
* generate all scales that include provided notes,
*
* For more information, examples and online documentation visit:
* http://webcodingeasy.com/PHP-classes/Implement-music-theory-to-generate-scale-and-chord-notes
**************************************************************/
/***************************************
* Some explanations of terms:
* note name = chord name = scale name //they all have the same value like C minor where C is note name, minor is chord or scale type
* chord = chord name + chord type
* scale = scale name + scale type
***************************************/
session_start();
//declaring class instance
include("./music_theory.php");
$mt = new music_theory();
/*******************************
* setting notation and storing it in session
*******************************/
if(!isset($_SESSION["notation"]))
{
$_SESSION["notation"] = "set_sharp";
}
if(isset($_POST["notation"]))
{
if(in_array($_POST["notation"], array("set_sharp", "set_flat")))
{
$_SESSION["notation"] = $_POST["notation"];
}
}
//using stored notation
$mt->$_SESSION["notation"]();
/*******************************/
?>
<style type='text/css'>
#chords td
{
text-align: center;
}
</style>
<?php
/*******************************
* changing notation sharp/flat
*******************************/
echo "<form action='' method='post'>";
echo "<p>Change notation: <select name='notation'>";
echo "<option value='set_sharp'>Use sharp notation</option>";
echo "<option value='set_flat'>Use flat notation</option>";
echo "</select> <input type='submit' value='Submit'/></p>";
echo "</form>";
/******************************/
//getting all notes
$notes = $mt->get_notes();
//getting all defined chord types
$chord_types = $mt->get_chord_types();
//getting all defined scale types
$scale_types = $mt->get_scale_types();
/**********************************************
* Get Chord notes from chord name (note name and chord type)
**********************************************/
echo "<fieldset><legend>Get Chord notes by name</legend>";
echo "<form action='' method='post'>";
echo "<table border='1' id='chords'>";
echo "<tr><td>Select Chord name</td><td>Select Chord type</td><td>Result:</td></tr>";
echo "<tr><td>";
echo "<select name='chord_name'>";
//outputting all notes
foreach($notes as $note)
{
echo "<option value='".$note."'>".$note."</option>";
}
echo "</select>";
echo "</td><td>";
echo "<select name='chord_type'>";
//outputting all chord types
foreach($chord_types as $chord)
{
echo "<option value='".$chord."'>".$chord."</option>";
}
echo "</select>";
echo "</td><td>";
//if isset post outputting result
if(isset($_POST["chord_name"]) && isset($_POST["chord_type"]))
{
//getting array with all chord notes using note name and chord type from sleect input
$arr = $mt->get_chord_by_name($_POST["chord_name"], $_POST["chord_type"]);
//check if there were any errors
$errors = $mt->get_errors();
if(!empty($errors))
{
foreach($errors as $error)
{
echo "<p>".$error."</p>";
}
}
else
{
echo "<p>";
foreach($arr as $val)
{
//outputting notes one by one
echo $val." ";
}
echo "</p>";
}
}
else
{
echo " ";
}
echo "</td></tr>";
echo "<tr><td colspan='3'><input type='submit' value='Submit'/></td></tr>";
echo "</table>";
echo "</form>";
echo "</fieldset>";
/**********************************************/
/**********************************************
* Get Scale notes from scale name (note name and scale type)
**********************************************/
echo "<fieldset><legend>Get Scale notes by name</legend>";
echo "<form action='' method='post'>";
echo "<table border='1' id='scales'>";
echo "<tr><td>Select Scale name</td><td>Select Scale type</td><td>Result</td></tr>";
echo "<tr><td>";
echo "<select name='scale_name'>";
//outputting all notes
foreach($notes as $note)
{
echo "<option value='".$note."'>".$note."</option>";
}
echo "</select>";
echo "</td><td>";
echo "<select name='scale_type'>";
//outputting all scale types
foreach($scale_types as $scale)
{
echo "<option value='".$scale."'>".$scale."</option>";
}
echo "</select>";
echo "</td><td>";
//if isset post outputting result
if(isset($_POST["scale_name"]) && isset($_POST["scale_type"]))
{
//getting array with all scale notes using note name and scale type from sleect input
$arr = $mt->get_scale_by_name($_POST["scale_name"], $_POST["scale_type"]);
//check if there were any errors
$errors = $mt->get_errors();
if(!empty($errors))
{
foreach($errors as $error)
{
echo "<p>".$error."</p>";
}
}
else
{
echo "<p>";
foreach($arr as $val)
{
//outputting notes one by one
echo $val." ";
}
echo "</p>";
}
}
else
{
echo " ";
}
echo "</td></tr>";
echo "<tr><td colspan='3'><input type='submit' value='Submit'/></td></tr>";
echo "</table>";
echo "</form>";
echo "</fieldset>";
/*********************************************/
/**********************************************
* Get Chord name or Scale name from notes
**********************************************/
echo "<fieldset><legend>Get Chords/Scales by notes </legend>";
echo "<form action='' method='post'>";
echo "<table border='1' id='chords'>";
echo "<tr><td>Select multiple notes</td><td>Search for</td><td>Result</td></tr>";
echo "<tr><td>";
echo "<select name='note_names[]' multiple='multiple' size='8'>";
//outputting all notes
foreach($notes as $note)
{
echo "<option value='".$note."'>".$note."</option>";
}
echo "</select>";
echo "</td><td>";
echo "<select name='search_type'>";
//selecting which method to use
//get chords or get scales
echo "<option value='get_chords_by_notes'>Chords</option>";
echo "<option value='get_scales_by_notes'>Scales</option>";
echo "</select>";
echo "</td><td>";
if(isset($_POST["note_names"]) && isset($_POST["search_type"]))
{
if(in_array($_POST["search_type"], array("get_chords_by_notes", "get_scales_by_notes")))
{
//getting from selected method by passing array with note names
$arr = $mt->$_POST["search_type"]($_POST["note_names"]);
echo "<table border='1' cellpadding='5'>";
$col = 0;
foreach($arr as $ch)
{
if($col % 8 == 0)
{
echo "<tr>";
}
$col++;
echo "<td style='text-align:left; vertical-align: top;'>";
//outputting chord or scale name iwth type
echo $ch["name"]." ".$ch["type"].":";
if($_POST["search_type"] == "get_chords_by_notes")
{
//if looking for chords, then getting all notes for eath chord
$ch_notes = $mt->get_chord_by_name($ch["name"],$ch["type"]);
}
else
{
//if looking for scales, then getting all notes for each scale
$ch_notes = $mt->get_scale_by_name($ch["name"],$ch["type"]);
}
echo "<ul>";
foreach($ch_notes as $ch_note)
{
//outputing notes
echo "<li>".$ch_note."</li>";
}
echo "</ul>";
echo "</td>";
if($col % 8 == 0)
{
echo "</tr>";
}
}
while($col % 8 != 0)
{
$col++;
echo "<td></td>";
}
echo "</tr>";
echo "</table>";
}
}
else
{
echo " ";
}
echo "</td></tr>";
echo "<tr><td colspan='3'><input type='submit' value='Submit'/></td></tr>";
echo "</table>";
echo "</form>";
echo "</fieldset>";
/******************************************/
/**********************************************
* Get All chords that can be played along inputed scale
**********************************************/
echo "<fieldset><legend>Get Chords by scale</legend>";
echo "<form action='' method='post'>";
echo "<table border='1' id='chords'>";
echo "<tr><td>Select Scale:</td><td>Result</td></tr>";
echo "<tr><td>";
echo "<select name='scale_for_chords'>";
//outputting all notes
foreach($notes as $note)
{
//mixing them with scale types using delimiter "_"
foreach($scale_types as $scale)
{
echo "<option value='".$note."_".$scale."'>".$note." ".$scale."</option>";
}
}
echo "</select>";
echo "</td><td>";
//if isset post outputting result
if(isset($_POST["scale_for_chords"]))
{
//exploding to note name and scale type using same delimiter "_"
$sc_data = explode("_", $_POST["scale_for_chords"]);
//getting chord by passing scale name and scale type
$arr = $mt->get_chords_by_scale($sc_data[0], $sc_data[1]);
echo "<table border='1' cellpadding='5'>";
$col = 0;
foreach($arr as $ch)
{
if($col % 8 == 0)
{
echo "<tr>";
}
$col++;
echo "<td style='text-align:left; vertical-align: top;'>";
echo $ch["name"]." ".$ch["type"].":";
//getting all notes for chord
$ch_notes = $mt->get_chord_by_name($ch["name"],$ch["type"]);
echo "<ul>";
foreach($ch_notes as $ch_note)
{
echo "<li>".$ch_note."</li>";
}
echo "</ul>";
echo "</td>";
if($col % 8 == 0)
{
echo "</tr>";
}
}
while($col % 8 != 0)
{
$col++;
echo "<td></td>";
}
echo "</tr>";
echo "</table>";
}
else
{
echo " ";
}
echo "</td></tr>";
echo "<tr><td colspan='3'><input type='submit' value='Submit'/></td></tr>";
echo "</table>";
echo "</form>";
echo "</fieldset>";
/*************************************************/
/**********************************************
* Get all scales that suits specified chord progressions
**********************************************/
echo "<fieldset><legend>Get Scales by chords</legend>";
echo "<form action='' method='post'>";
echo "<table border='1' id='chords'>";
echo "<tr><td>Select multiple chords:</td><td>Result</td></tr>";
echo "<tr><td>";
echo "<select name='chords_for_scale[]' multiple='multiple' size='20'>";
//outputting note nams
foreach($notes as $note)
{
//mixing with chord types using delimiter "_"
foreach($chord_types as $chord)
{
echo "<option value='".$note."_".$chord."'>".$note." ".$chord."</option>";
}
}
echo "</select>";
echo "</td><td>";
if(isset($_POST["chords_for_scale"]))
{
$arr = array();
foreach($_POST["chords_for_scale"] as $ch)
{
//as user selected multiple chords, explode each chord using same delimiter "_"
$ch_data = explode("_", $ch);
$cur = sizeof($arr);
//forming properly structured array for get_scales_by_chords method
$arr[$cur]["name"] = $ch_data[0];
$arr[$cur]["type"] = $ch_data[1];
}
//getting all scales that suits specified chords
$res = $mt->get_scales_by_chords($arr);
echo "<table border='1' cellpadding='5'>";
$col = 0;
foreach($res as $ch)
{
if($col % 8 == 0)
{
echo "<tr>";
}
$col++;
echo "<td style='text-align:left; vertical-align: top;'>";
echo $ch["name"]." ".$ch["type"].":";
//getting notes for each scale
$ch_notes = $mt->get_scale_by_name($ch["name"],$ch["type"]);
echo "<ul>";
foreach($ch_notes as $ch_note)
{
echo "<li>".$ch_note."</li>";
}
echo "</ul>";
echo "</td>";
if($col % 8 == 0)
{
echo "</tr>";
}
}
while($col % 8 != 0)
{
$col++;
echo "<td></td>";
}
echo "</tr>";
echo "</table>";
}
else
{
echo " ";
}
echo "</td></tr>";
echo "<tr><td colspan='3'><input type='submit' value='Submit'/></td></tr>";
echo "</table>";
echo "</form>";
echo "</fieldset>";
/***********************************************/
?>
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